272 PLIOCENE MOLLUSCA. 



a variety of R. affennata (Quart. Journ. Geol. Soc, vol. xxvii, p. 494, 1871), but 

 this view I cannot accept. 



It seems desirable tliat the verified specimen of this fossil should be figured for 

 purposes of future reference. "Wood's drawing of B. ciirtistoma is not a successful 

 one, and he does not seem sure that it represents the specimen upon which the 

 species in question was originally founded. 



The shells from Oakley figured under the present name, although not abso- 

 lutely the same as Mr. Bell's type specimen, may be regarded, I think, as a variety 

 of it. I have found several specimens of the species at that place. 



Raphitoma nebula (Montagu). Plate XXX, figs. 14 — 19. 



1803. ilurex nehula, Montagu, Test. Brit., pt. i, p. 267, pi. xvi, fig. 6. 



1853. Mangelia nebula, Forbes and Hanley, Brit. Moll., vol. iii, p. 476, pi. cxiv, figs. 7 — 9. 



1867. Pleurotoma nebula, Jeffreys, Brit. Conch., vol. iv, p. 384, pi. xci, fig. 1. 



1872. Pleurotoma nebula, S. V. Wood, Mon. Crag Moll., 1st Suppl., pt. i, p. 45, pi. vii, fig. 7. 



1873-5. Baphitoma nehula, Seguenza, Boll. E. Com. Geol. Italia, vol. iv, p. 298, no. 103, 1873 ; 



vol. vi, p. 210, no. 221, 1875. 

 1883. Baphitoma nebula, Bucquoy, Dautzenberg et DoUfus, Moll. mar. Rouss., vol. i, p. 99, figs. 22, 23. 

 1890. Bapldtoma nebula, Cams, Prod. Faun. Medit., vol. ii, p. 421. 



1901. Mangelia nehula, Br^gger, Norges geol. uiiders^gelse, vol. xxxi, p. 662, pi. xvii, fig. 8. 

 1905. Baphitoma (Ginnania) nebula, Kobelt, Icon, schalentrag. europ. Meeresconch., vol. iii, p. 374, 



pi. xcvii, figs. 1, 2. 

 1910. Baphitoma nebula, CeriiUi-Irelli, Palaeont. Ital., vol. xvi, p. 68, pi. vi, figs. 44 — 46. 



Specific Characters. — Shell small, solid, elongato-conical ; whorls more or less 

 convex, sometimes depressed above, the last attenuated towards the canal; orna- 

 mented by strong, rounded, prominent ribs, and usually by fine spiral lines, the ribs 

 nearly reaching the base, and in the Crag varieties to the suture; suture distinct; 

 mouth oval, somewhat compressed, angulate above; canal short, fairly wide, 

 turning slightly to the left; labial notch not conspicuous as in B. 'niitrula; outer 

 lip gently curved, not expanded. 



Dimensions. — L. 8 — 10 mm. B. 3 — 4 mm. 



Distribution. — Becent : coasts of Great Britain and Ireland, southern coasts of 

 Norway, northern France to Madeira, the Mediterranean, Adriatic and ^Egean. 



Fossil : Coralline Crag : Sutton. Waltonian : Walton-on-Naze, 

 Beaumont, Little Oakley. Newbournian : Sutton, Waldringfield, Newbourn, 

 Felixstowe. Butleyan : Butley. Pleistocene : Moel Tryfan, Macclesfield. 



Upper Pliocene : Northern Italy, Monte Mario, Altavilla. Pleistocene : Italy — 

 TarantOj Valle Biaia; Sicily — Monte Pellegrino, Ficarazzi, Messina, Catania. 

 Tapes-banks: Christiania, Trondhjem. 



Remarks. — This species, though by no means abundant in the Crag, is repre- 

 sented there by several more or less distinct varieties, corresponding with forms 



